<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style> 
  *{
    padding: 0;
    margin: 0;
  }
   .box1{
    width:100%;
    height:100px;
    background-color: red;
  }
   .box2{
    width:30%;
    height:800px;
    background-color:green;
    float:left;
  }
   .box3{
     width:70%;
     height:800px;
     background-color: #123;
     float:left;
   }
   .box4{
     width:100%;
     height:100px;
     background-color: #189;
     float:left;
    }
  </style>
</head>
<body>
  <div class="box1"></div>
  <div class="box2"></div>
  <div class="box3"></div>
  <div class="box4"></div>
</body>
</html>